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Protocol

msg := SDDDDDD | 'OVERRNG' CR LF
S := '-' | ' '
D := '0'..'9'|'.'

Unfortunately the device does not send the measured unit.

Support in sigrok

The device is supported by the driver bbcgm-m2110 in modes that send data automatically or manually. Polling is not implemented. The device does not send the measured quantity or unit via the serial interface, just the value.

The device detection requires a message to be sent by the device within 1s. The default serial port parameters are 1200/7n2.

After power on or configuration changes the button Start/Reset must be pressed at least once to initiate sending.